Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 55, Problem 12RQ
The high-side pressure on a system with a cycling clutch and pressure cycling switch is 245 psi, the low- side pressure is 28 psi, and the ambient temperature is 78°F. What do these gauge readings indicate?
- The system is undercharged.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Which of the following statements is not true?
A direct acting PRV:
Is complex in construction, therefore can malfunction if a very small dirt gets trapped inside the valve, which may result in safety hazard
Offers uneven flow
Does not provide precise pressure control
Causes more wastage of HP compared to a compound one
Which of the following basic system components has the primary function of removing the heat of compression from the air?
Receiver
Relief valve
Pressure regulator
Dryer
Aftercooler
Which of the following statements is true?
A single acting cylinder may have two ports at two different ends and pressurized fluid can be directed to both of them
A single acting cylinder with two ports will can be used as a double acting cylinder
A single acting cylinder may have two ports at two different ends but into only one of the ports pressurized fluid is being directed
A single acting cylinder…
Match the following in the right order
A vehicle is having its water pump replaced.
When the water pump is removed, severe
corrosion is found on the water pump
impeller, and inside the engine. Technician A
states that the radiator cap may be
overpressurizing the system. Technician B
states that the vehicle may have been run
with 100% water in the cooling system for
some time. Who is correct?
Select one:
a. Technician A only
b. Technician B only
c. Both Technicians A and B
d. Neither Technician A nor B
Chapter 55 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 55 - What should you do if you suspect that an...Ch. 55 - Explain how dye can be used to find leaks in the...Ch. 55 - What is the purpose of the thermostatic switch in...Ch. 55 - Why should the probe of an electronic leak...Ch. 55 - How will air trapped in the A7C system affect...Ch. 55 - Which of the following statements best defines the...Ch. 55 - Which of the following statements is not true...Ch. 55 - To charge an air-conditioning system while it is...Ch. 55 - All of the following are true statements about...Ch. 55 - A very important part of a performance test on an...
Ch. 55 - While conducting a pressure test on an A/C system,...Ch. 55 - The high-side pressure on a system with a cycling...Ch. 55 - When checking an A/C system, the evaporators inlet...Ch. 55 - All of these are good reasons for replacing an...Ch. 55 - In an AZC system, if the low-side pressure is...Ch. 55 - Technician A says that evacuating (pumping down)...Ch. 55 - Technician A says that some refrigerant leaks can...Ch. 55 - Technician A says that the presence of oil around...Ch. 55 - Technician A says that a faulty accumulator will...Ch. 55 - Technician A says that air in the system can cause...Ch. 55 - Technician A feels up and down the face or along...Ch. 55 - Technician A says that a manifold gauge set can be...Ch. 55 - While discussing an inoperative blend air door:...Ch. 55 - Two technicians were discussing how comparing the...Ch. 55 - While conducting an A/C system performance test:...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Why does the high-pressure gauge on a regulator not always indicate the amount of gas in the cylinder?arrow_forwardWhile discussing the results of an oil pressure test: Technician A says that when the fluid pressures are high, internal leaks, a clogged filter, low oil pump out put, or a faulty pressure regulator valve are indicated. Technician B says that if the fluid pressure increased at the wrong time, an internal leak at the servo or clutch seal is indicated. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward1-While refilling an 8-quart (7.57 L) system with coolant: Technician A initially puts in 4 quarts (3.78 L) of straight coolant and tops it off with water. Technician B fills the system with the correct mixture, tightens the radiator cap, and then checks for leaks. Who is correct? 2-While checking for conditions that might cause coolant electrolysis: Technician A places the positive lead of a voltmeter into the coolant and connects the negative lead to a ground. Technician B checks for the presence of voltage in the coolant with the ignition off. Who is correct? 3-Technician A says that if the PCV valve or connecting hoses become clogged, excessive pressure will develop in the crankcase and can cause oil leaks. Technician B says that if the PCV valve or connecting hoses become clogged, oil may be pushed into the air cleaner or cause it to be drawn into the intake manifold. Who is correct? 4-While bleeding air from a cooling system: Technician A loosens a heater hose at its highest…arrow_forward
- When performing a coolant pressure test, Technician A says to pressurize the system to the pressure shown on the radiator cap. Technician B says that the coolant should be drained before performing the test. Who is correct? Select one: a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardIn an AZC system, if the low-side pressure is lower than normal, which of the following is the least likely cause? A faulty metering device Poor airflow across the evaporator A restriction in the low side of the system The system being overcharged with refrigerantarrow_forwardTechnician A says that air in the system can cause excessive pressure within the system, restricting the refrigerants ability to change its state from gas to liquid within the refrigeration cycle. Technician B says that moisture can cause freeze-up at the cap tube or expansion valve, which restricts refrigerant flow or blocks it completely. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forward
- When the engine is idling, the pressure regulator in a PFI system provides ____fuel pressure compared to the fuel pressure at wide-open throttle.arrow_forwardHow is the maintenance of a multi-piston cylinder different from regular cylinders?arrow_forwardWhich of the following is true about a sequence valve? Sequence valves: A. Allow a check valve to override its normal operation B. Controls the rate of air flow in a pneumatic system C. Direct air flow to a different area in a circuit when actuated by pressure level D. Open and close the intet and outlet ports in a pneumatic systemarrow_forward
- Why must nitrogen be used only with a regulator when it is charged into a system?arrow_forwardWhich of the following is not an effective way to determine if an engine has an internal coolant leak? Performing a pressure test on the system Visually inspecting the exhaust, coolant, and engine oil Using a dye penetrant and black light Using a combustion leak testerarrow_forwardWhat are the benefits of a hybrid HVAC system?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage Learning
Automotive TechnologyMechanical EngineeringISBN:9781337794213Author:ERJAVEC, Jack.Publisher:Cengage,
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Welding: Principles and Applications (MindTap Cou...Mechanical EngineeringISBN:9781305494695Author:Larry JeffusPublisher:Cengage Learning
Automotive Technology: A Systems Approach (MindTa...
Mechanical Engineering
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning
Automotive Technology
Mechanical Engineering
ISBN:9781337794213
Author:ERJAVEC, Jack.
Publisher:Cengage,
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
Welding: Principles and Applications (MindTap Cou...
Mechanical Engineering
ISBN:9781305494695
Author:Larry Jeffus
Publisher:Cengage Learning
Mechanical Design (Machine Design) Clutches, Brakes and Flywheels Intro (S20 ME470 Class 15); Author: Professor Ted Diehl;https://www.youtube.com/watch?v=eMvbePrsT34;License: Standard Youtube License